[PATCH 4.9 17/66] mei: request autosuspend after sending rx flow control

[Greg Kroah-Hartman]

From: Alexander Usyskin <alexander.usyskin@xxxxxxxxx>

commit bbf0a94744edfeee298e4a9ab6fd694d639a5cdf upstream.

A rx flow control waiting in the control queue may block autosuspend.
Re-request autosuspend after flow control been sent to unblock
the transition to the low power state.

Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Alexander Usyskin <alexander.usyskin@xxxxxxxxx>
Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx>
Link: https://lore.kernel.org/r/20210526193334.445759-1-tomas.winkler@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/misc/mei/interrupt.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -226,6 +226,9 @@ static int mei_cl_irq_read(struct mei_cl
 		return ret;
 	}
 
+	pm_runtime_mark_last_busy(dev->dev);
+	pm_request_autosuspend(dev->dev);
+
 	list_move_tail(&cb->list, &cl->rd_pending);
 
 	return 0;